Concrete building construction



y 1934- J. LASKER I CONCRETE BUILDING CONSTRUCTION Filed April 2 3, 1932 INVENTOR. JVIIUS LOIS/(er IlIl/lI/l/ll/i l ATTORNEY.

Fatenteol May 1, 1%34 UNITED STATES I 1,957,026 CONCRETE BUILDING CONSTRUCTHON 3 Julius Lasker, Roxbury, Mass.

Application April 23, 1932, Serial No. 607,148

11 Claims.

' walls carry only their own weight for the height of one story, and consist exteriorly of hollow slabs of two sheets or curtains each, which are made up of precast concrete slabs, also one story in height, andof a thickness sufficient to render same weatherproof. In order to facilitate the handling and erection of such slabs the size, width, and weight of each are not too great for convenient transportation and erection.

The outside surface of the exterior sheet and the inside surface of the interior sheet of such exterior walls are respectively formed flush with the outer and inner faces of the columns, thus limiting the total thickness of the wall to the width of said columns. If desired, of course, said sheets may overlap the columns on one or both sides or, on the other hand, the .columns may project beyond the wall sheets, but only the details of the jointures will be affected by such variations. In any case, there is a sufficient air space between the two wall sheets to insure suitable insulation against extremes of temperature and dampness.

To further facilitate the construction, I finish the outside surface of the exterior sheet durin the casting process, so that no external plastering will be needed. Only the narrowvertical joints between the slabs have tobe pointed, before the whole outer wall surface'is coated with a cement paint containing pigments, or the like, to provide any desired color. Likewise, the

inside surface of the interior sheet is formedsufflciently smooth to thereby render plaster unnecessary, thus eliminating expense.

With the exception of one board at each joint where the floor sections come together, no forms or moulds are utilized in the erection of the building. The component parts of the building are so precast that little skilled labor is necessary to assemble them on the job, which, to a great degree, lessens the cost, and speeds up the operation.

The details of construction, such as reinforcea tries v ment and the like, follow well-established engineering principles anddo not appear in the drawing.

- In the accompanying drawing:

Fig. 1 is an elevational diagrammatical view, showing a plurality of columns and girders thereon; V

Fig. 2 shows a column splice, in perspective.

Figs. 3 and 4 are structural sections on lines 33 and 44 of Fig. 1;

Fig. 5 is a perspective broken view of a main girder;

Fig. 6 is a perspective view of parts in cooperative relation, employing constructions here shown.

Columns and girders Each column comprises precast concrete sections, C, each one story in height, the sections being disposed in vertical columnar relation, with the lower end of the lower column section resting on a foundation to which it is bolted by bolts passing through anchorage angles (not shown) connected to the columns. w

Adjacent ends of adjacent sections in. the columns are notched, as at 2, (Fig. 2) which notches cooperate to define openings through which pass supporting girders or beams G1 of concrete, each of which is encased in a metallic flush-seated sleeve or yoke 3 where it rests in the notch on the upper end of a lower column section. Bolted to the column sections at their ends and symmetrically spaced from their splice line are angles 4 whose horizontal parts are connected by vertical bolts passing through the beams G1 and their sleeves 3. The construction thus far described forms an eflicient connection between the precast concrete, columns or sections thereof, and the precast concrete beams.

The girders or beams are of two kinds; certain ones, referenced G1 and hereafter called main or supporting beams, are supported on columns directly, and have anchor span portions connecting the columns and cantilever or free portions overhanging the columns; other ones, referenced G2 and called minor or supported beams, connect the cantilever portions of the main or supported beams G1 and are supported by these portions. The connections between the adjacent ends of adjacent beams G and G2 are efiected through flush-seated steel sleeves or yokesv iiflthrough which pass bolts G2 to one another.

The column and girder construction described is extremely satisfactory for several reasons. The supporting beams G1 are seated directly on the column ends and distribute their loads evenly throughout the columns. The cantilever principle, used so effectively in bridge design, is just as effectively utilized here, in connection with precast concrete columns, for buildings.

Details Belt course.Precast concrete slabs B, having metallic flush-seated plates 10 on their upper surfaces, are seated on the girders, between columns, and are bolted thereto, by vertical bolts 11, to form a horizontal belt course, which functions to ornament the building appearance, and to aid in supporting and aligning hereinafter described floor and wall parts.

Floor slabs.-Precast relatively narrow floor slabs F (Fig. v6) having extending ribs 12 seated on the belt course slabs B form the floors. Adjacent edges of the floor slabs are contoured to receive a grouting, 12a.

Wall slabs.--Precast, relatively narrow, concrete wall slabs or curtains W1, W2, each one story in height, are disposed vertically on opposite sides of the beams. The lower'edges of the lower story slabs W1 and W2 rest on the foundation.

The lower edges of the upper story outer wall slabs W1 rest on the plates 10 of the belt course slabs B ahead or in front of the girders. The lower edges of the upper story inner wall slabs W2 rest on the floor slabs F. The upper edges of the outer wall slabs W1, are received in grooves 13 on the lower surfaces of the belt course slabs B and are thus held in place. The upper edges of the inner wall slabs W2 are received between the vertical flanges 14 of metal members 15 and the sides of the beams and are thus held in place. The side edges of the wall slabsare flush with the columns, and the space between them forms a dead air-space.

Adjacent side edges of the wall slabs are contoured to receive a grouting 16.

The metal members 15 are secured to the inner wall slabs by clips 18, and form an effective alignment means between the various slabs B, F, and W2, that intersect at a story line.

The wall slabs are traversed by embedded pipes or tubes 20 through which pass rods 21 also pass-- ing through pipes embedded in the columns C, these rods also passing through the eyes of eye bolts 22 threaded into the beams G1 and G2 these rods serving to suspend the wall slabs from the skeleton or frame formed of the columns and girders.

Features The structure described in the foregoing possesses many desirable features, certain of which are here outlined specifically.

Column and girder joint-Since a main girder passes through a column, its load is distributed equally and centrally on the column; further, the well known advantages of having beams continuous as they pass their supporting columns, is here attained by the notch construction shown.

Cantilever.The main beams have cantilever ends projecting from the anchor span portions, which support the minor beams, following cantilever principles well known in connection with the art of bridge design.

which rigidly secure the ends of beams G1 and The belt course is so secured to the girders that in effect it forms part of the building frame. The floor slabs are therefore supported directly from the girders, and are positioned with respect thereto by the metallic members 15. The outer wall slabs are individually supported by the frame, the girders (the belt course) and the columns, and not from one another. The inner wall slabs are similarly individually supported by the frame, and not from one another.

I claim:

1. In a concrete building construction, a twopart separated vertical column, the adjacent ends of the parts having aligned notches which together form a hole, a horizontal girder passing continuously through said hole and resting in the notch on the upper end of the lower part of the column, and means mutually connecting the column parts to the girder.

2. In a concrete building construction, a twopart separated vertical column, the adjacent ends of the parts having alinged notches which together form a hole, a horizontal girder passing continuously through said hole and resting in the notch on the upper end of the lower part of the column, metallic members extending laterally from the adjacent ends of the column parts, and means connecting said members to each other and to the girder, so that the column parts and the girder will be rigidly connected mutually.

3. In a concrete building construction, a twopart separated vertical column, the adjacent ends of the parts having aligned notches which together form a hole, a horizontal girder passing through said hole and resting in the notch on the upper end of the lower part of the column, metallic members extending laterally from the adjacent ends of the column parts, and means connecting said members to each other and to the girder, so that the column parts and the girder will be rigidly connected mutually, the girder, whereit passes through the column, being encased in a metallic yoke, and being continuous from well beyond the column on one side to well beyond the column on the other.

4. In combination, a plurality of vertical columns, horizontal girders connecting said columns, and vertical wall slabs between the columns, the slabs having elongated bolts passing horizontally and loosely therethrough, from edge to edge thereof, and extending beyond vertical edges of the slabs, the extending portions of the bolts projecting directly into the body proper of the columns and being rigidly connected thereto so as to provide ties for the wall slabs.

5. In combination, a plurality of vertical columns, horizontal girders connecting said columns, and vertical wall slabs between the columns, the slabs having elongated bolts passing horizontally and loosely therethrough, from edge to edge thereof, and extending beyond vertical edges of the slabs, the extending portions of the bolts projecting directly into the body proper of the columns and being rigidly connected thereto so as to provide ties for the wall slabs, the lower edges of the wall slabs being supported directly on the girders.

6. In combination, a plurality of vertical columns, horizontal girders connecting said columns, and vertical wall slabs or curtains between the columns, each slab having elongated bolts passing horizontally therethrough, from edge to edge thereof, the bolts at their ends projecting into the columns so as to provide ties for the wall slabs,

horizontal slabs resting on and anchored to said girders and having their forward edges projecting horizontally forwardly of said girders, the lower edges of certain wall slabs resting on those parts of adjacent horizontal slabs which are forward of the girders, the upper edges of certain wall slabs being received in grooves on the under surfaces of those parts of adjacent horizontal slabs which are forward of the girders.

' '1. In a building construction, spaced vertical columns, main beams supported by and connecting alternate pairs thereof and having anchor span portions between their supporting columns and spanning the space between their supporting columns and also having cantilever ends projecting well beyond their supporting columns, and minor beams connected to and supported by the cantilever ends of the major beams the minor beams being shorter than the column spacing.

8. In a building construction, spaced vertical columns, main beams supported by and connecting alternate pairs thereof and having anchor span portions between their supporting columns and spanning the space between their supporting columns and also having cantilever ends projecting well beyond their supporting columns, and. minor beams connected to and supported by the cantilever ends of the major beams the minor beams being shorter than the column of spacing, the connections between the sets of beams being effected through metallic box-like members embracing adjacent ends of beams.

9. In a building construction, vertical columns, main beams, supported by and connecting alternate pairs thereof and having anchor span portions between their supporting columns and cantilever ends projecting well beyond their supporting columns, and minor beams connected and supported by the cantilever ends of the major beams, the main beams being continuous as they pass their supporting columns, and having metallic sleeves encasing them at their intersections with the columns.

10. In combination, a horizontal slab, a second horizontal slab having edge portions resting thereon, a vertical slab having its lower edge resting on the second horizontal slab, and a second vertical slab havihg its upper edge under the lower edge of the first vertical slab, and a metallic member having a vertical part secured to the upper vertical slab, and engaged by a horizontal edge of the second horizontal slab, a horizontal part resting on the first horizontal slab, and a hook part embracing the upper edge of the lower vertical slab.

11. In combination, a multi-story building frame comprising vertical columns, and horizontal beams at the floor levels, a series of vertical wall slabs each one story in height and together forming a single story vertical wall panel, each slab having its lower edge resting directly on the subjacent beam, and having its upper edge free of loads from above, and continuous means passing horizontally through the slabs in a wall panel to tie the slabs therein to one another, the means tying the panel as a whole to the col- JULIUS LASKER. 

